Glass roll

Abstract

Provided is a glass roll utilizing a flanged roll core, and reliably inhibiting a glass film from breaking from an end portion in a width direction thereof as an origin of breakage. A glass roll ( 1 ) is formed by winding a glass film ( 4 ) and a cushion sheet ( 5 ), under a state of being superposed, around a roll core ( 3 ) including a flange ( 2 ) at each end portion thereof, in which an end portion in a width direction of the glass film ( 4 ) is separated from the flange ( 2 ) on each side in the width direction of the glass film ( 4 ), and the cushion sheet ( 5 ) is extended beyond the end portion in the width direction of the glass film ( 4 ) to the flange ( 2 ) side, to thereby form an extension portion ( 5 a ).

The invention claimed is: 
     
       1. A glass roll, which is formed by winding a glass film and a cushion sheet, under a state of being superposed, around a roll core including a flange at each end portion of the roll core,
 wherein an end portion in a width direction of the glass film is separated from the flange on each side in the width direction of the glass film, and cushioning means is arranged between the flange and the end portion in the width direction of the glass film, 
 wherein the cushion sheet is extended beyond the end portion in the width direction of the glass film, and 
 wherein the cushioning means includes an extension portion of the cushion sheet. 
 
     
     
       2. The glass roll according to  claim 1 , wherein the extension portion of the cushion sheet is out of contact with the flange. 
     
     
       3. The glass roll according to  claim 2 , wherein each end portion in the width direction of the glass film includes a cut surface which is cut by laser splitting. 
     
     
       4. The glass roll according to  claim 1 , wherein the extension portion of the cushion sheet is held in contact with the flange. 
     
     
       5. The glass roll according to  claim 4 , wherein each end portion in the width direction of the glass film includes a cut surface which is cut by laser splitting. 
     
     
       6. The glass roll according to  claim 1 , wherein each end portion in the width direction of the glass film includes a cut surface which is cut by laser splitting. 
     
     
       7. A glass roll, which is formed by winding a glass film and a cushion sheet, under a state of being superposed, around a roll core including a flange at each end portion of the roll core,
 wherein an end portion in a width direction of the glass film is separated from the flange on each side in the width direction of the glass film, and cushioning means is arranged between the flange and the end portion in the width direction of the glass film, 
 wherein the cushioning means includes another cushion member provided separately from the cushion sheet, and 
 wherein the other cushion member is held in contact with only any one of the flange and the end portion in the width direction of the glass film. 
 
     
     
       8. The glass roll according to  claim 7 , wherein each end portion in the width direction of the glass film includes a cut surface which is cut by laser splitting.